Estimation of Annual Average Daily Traffic for Off-system Roads in Florida
Author :
Publisher :
Page : 88 pages
File Size : 50,91 MB
Release : 1999
Category : Traffic estimation
ISBN :
Author :
Publisher :
Page : 88 pages
File Size : 50,91 MB
Release : 1999
Category : Traffic estimation
ISBN :
Author : Tao Pan
Publisher :
Page : pages
File Size : 28,34 MB
Release : 2008
Category :
ISBN :
ABSTRACT: In the first part, this thesis performed a study to compile and compare current procedures or methodologies for the estimation of traffic volumes on the roads where traffic counts are not easily available. In the second part, linear regression was practiced as an AADT estimation process, which was primarily based on known or accepted AADT values on the neighboring state and local roadways, population densities and other social/economic data. To develop AADT prediction models for estimating AADT values, two different types of database were created, including a social economic database and a roadway characteristics database. Ten years social economic data, from 1995 to 2005 were collected for each of the 67 counties in the state of Florida, and a social economic database was created by manually imputing data obtained from different resources into the social economic database. The roadway characteristics database was created by joining different GIS data layers to the Tele Atlas base map provided by Florida Department of Transportation (FDOT). Stepwise regression method was used to select variables that will be included into the final models. All selected independent variables in the models are statistically significant with a 90% level of confidence. In total, six linear regression models were built. The adjusted R2 values of the AADT prediction models vary from 0.166 to 0.418. Model validation results show that the MAPE values of the AADT prediction models vary from 31.99% to 159.49%. The model with the lowest MAPE value is found to be the minor state/county highway model for rural area. The model with the highest MAPE value is found to be the local street model for large metropolitan area. In general, minor state/county highway models provide more reasonable AADT estimates as compared to the local street model in terms of the lower MAPE values.
Author : Fang Zhao
Publisher :
Page : 168 pages
File Size : 30,42 MB
Release : 2004
Category : Cluster analysis
ISBN :
Author : Jacqueline M. Hughes-Oliver
Publisher :
Page : 74 pages
File Size : 48,77 MB
Release : 2006
Category : Traffic flow
ISBN :
The Traffic Survey Unit (TSU) manages 40,000 traffic monitoring stations, of which 25,000 are updated annually. These counts obtained by TSU play a crucial role in allocation of resources for the maintenance, upgrade, and expansion of traffic infrastructure. The need for reliable, edited, and validated traffic count data is well acknowledged by the Federal Highway Administration (FHWA) and the American Association of State Highway and Transportation Officials (AASHTO). The research reported here addressed this need by developing a statistically defensible approach to achieving spatial continuity of traffic counts as part of the editing and validation process. The deliverables include GIS-formatted data that programmatically identify PTC stations that have anomalous counts. We also provide information for creating traffic continuity maps. Identification of problem areas is quick and reduces the burden on NCDOT staff. As such, the project will significantly improve the process of validating traffic counts by increasing the accuracy of reported counts, by reducing the time delay between data collection and reporting, and by making it easy to provide customized reports of traffic counts to NCDOT departments and customers.
Author : David Lloyd Greene
Publisher :
Page : 96 pages
File Size : 17,58 MB
Release : 1979
Category : Transportation
ISBN :
Author : Florida. State Road Department. Division of Research and Records
Publisher :
Page : 62 pages
File Size : 14,68 MB
Release : 1941
Category : Roads
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Author : United States. Federal Highway Administration. Office of Highway Information Management
Publisher :
Page : 208 pages
File Size : 19,54 MB
Release : 1992
Category : Traffic congestion
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Author : Ken Skorseth
Publisher :
Page : 112 pages
File Size : 50,34 MB
Release : 2000
Category : Gravel roads
ISBN :
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Author : Lee August Rodegerdts
Publisher : Transportation Research Board
Page : 407 pages
File Size : 19,47 MB
Release : 2010
Category : Technology & Engineering
ISBN : 0309155118
TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-offs associated with roundabouts. This report updates the U.S. Federal Highway Administration's Roundabouts: An Informational Guide, based on experience gained in the United States since that guide was published in 2000.
Author :
Publisher :
Page : 996 pages
File Size : 15,41 MB
Release : 1927
Category : Roads
ISBN :
Accompanied by "Florida highways official detour bulletin, " Feb. 1942-